| A | B |
| astronomer | studies outer space, the solar system, and the objects in it |
| biomedical engineer | designs adn builds body parts and devices |
| biologist | studies all forms of life |
| zoologist | stuides animal life |
| ecologist | studies animals and the way they interact with their environment |
| ornithologist | studies birds |
| hematologist | studies blood & its diseases |
| lepidopterist | studies butterflies & moths |
| taxonomist | studies classification |
| paleontologist | studies dinosaurs & fossils |
| seismologist | studies earthquakes |
| chemist | studies elements, atoms, & molecules |
| ichthyologist | studies fish |
| entomologist | studies insects |
| mammalogist | studies mammals |
| microbiologist | studies microscopice organisms |
| mineralogist | studies minerals |
| physicist | studies motion, forces & energy to explain the way it works |
| parasitologist | studies parasites |
| mycologist | studies fungi |
| botanist | studies plant life |
| geophysicist | studies processes that change & shape the Earth |
| herpetologist | studies reptiles and amphibians |
| geologist | studies rocks, minerals, and Earth's land forms |
| audiologist | studies sound & its properties |
| meteorologist | studies teh atmosphere & weather |
| environmentalist | studies the environment |
| marie biologist | studies the life forms found in the ocean |
| oceanographer | studies the ocen |
| archaeologist | studies the remains of human life |
| virologist | studies viruses |
| volcanologist | studies volcanoes |
| hydrologist | studies water & the water cycle |
| cell biologist | studies the structure of cells to learn how they function & interact |